Teaching scale



FIG. 1 is a top plan view of the invention;

FIG. 2 is a front elevational view of the invention;

FIG. 3 is a bottom plan view of the invention;

FIG. 4 is a rear elevational view of the invention;

FIG. 5 is a right side elevation view of the invention; and,

FIG. 6 is a left side elevation view of the invention. 

The ornamental design for a teaching scale, as shown. 